Statisticshard · Past Paper
A bag contains 6 white and 4 black balls. If two balls are drawn with replacement, what is the probability that they are of different colors?
A0.48
B24/100
C0.50
D0.24
✓ Correct Answer: A — 0.48
P(WB) + P(BW) = (6/10 * 4/10) + (4/10 * 6/10) = 24/100 + 24/100 = 48/100 = 0.48.
Share this question
More from Statistics
- A bag contains 3 red, 5 black and 4 white balls. What is the probability that a ball drawn is NOT black?
- If the mean of a data set is 10 and the coefficient of variation is 20%, what is the standard deviation?
- In a class of 30, 10 students like tea, 15 like coffee and 5 like both. What is the probability that a student chosen at random likes neither?
- The mean of 10 observations is 15. If one observation 24 is replaced by 34, what is the new mean?
- In which data series is the formula for median position (N/2) used instead of (N+1)/2?